Question

Out of 2700 students in the school,30% of the students are girls.Find the number of boys in the school.​

Answer 1

$\sf \large\underbrace{ \underline{Understanding \: Concept}}$

As percentage of number of girls is given so we have to find number of girls and then subtract from total number of students to find the number of boys in the school.

So First we have to find out number of girls.

Let's start!

$\large \bf30\% \: of \: 2700$

$\large \bf : \implies \: \: \frac{30}{100} \: \times \: 2700$

$\large \bf : \implies \: \: \cancel\frac{81000}{100}$

$\large \bf : \implies \: \: 810$

So number of girls=810

Number of boys=Total students-no. of girls

$\bf : \implies \: \: 2700 - 810$

$\bf : \implies \: \: 1890$

So number of boys =1890.